CVE-2021-35242: Serv-U File Server 15.2.5 Release Notes

Release date: December 2, 2021

These release notes describe the new features, improvements, and fixed issues in Serv-U File Server 15.2.5. They also provide information about upgrades and describe workarounds for known issues.

If you are looking for previous release notes for Serv-U File Server, see Previous Version documentation.

For details about the latest hotfixes, see Serv-U hotfixes.

Additional Serv-U documentation includes:

• Serv-U Installation and Upgrade Guide
• Serv-U 15.2 Administrator Guide
• System Requirements
• Getting Started with Serv-U

New features and improvements

Serv-U 15.2.5 is a service release containing internal improvements and security fixes, described in the Fixed Issues section.

Upgrade notes****Licensing

The Serv-U licensing framework was changed in Serv-U 15.2.3 and a new license key needs to be used to activate this product version otherwise it will not be possible to use it.

If your Serv-U product maintenance is active, you can find your new license key generated on customer portal. Use this new license key to activate Serv-U after installation.

SolarWinds strongly recommend that you upgrade to this version with the new licensing framework as older framework will not be supported in the future.

Password security

If you are upgrading from version 15.1.7 or older, increased password security will automatically convert existing MD5 passwords using a more secure algorithm when users connect for the first time after upgrade.

If an account is not used within 90 days of the upgrade, access will be restricted and the user will not be able to log in afterward. The administrator will be required to change their password.

Fixed issues

Serv-U 15.2.5 fixes the following issues:

Case Number

Description

00784127

Authenticated Serv-U account can be moved to new Collection.

00875523, 00897792

Preload and SubDomains arguments added to HSTS headers.

00888650, 00808537

Issue resolved with HTTP authentication on CentOS 7/8.

n/a

Issue with the server setting option “Allow HTTP sessions to change IP address” has been fixed.

n/a

The limit for the number of passive FTP ports increased to 500.

n/a

The user setting “Change password on next login” has been fixed.

For Serv-U 15.2.4 fixes, see the 15.2.4 Release Notes.

For Serv-U 15.2.3 fixes, see the 15.2.3 Release Notes.

For Serv-U 15.2.2 fixes, see the 15.2.2 Release Notes.

For Serv-U 15.2.1 fixes, see the 15.2.1 Release Notes.

For Serv-U 15.2 fixes, see the 15.2 Release Notes.

CVE information

SolarWinds would like to thank our Security Researchers below for reporting on this issue in a responsible manner and working with our security, product, and engineering teams to fix the vulnerability.

CVE-ID

Vulnerability Title

Description

Severity

Credit

CVE-2021-35242

A valid CSRF token is present in response to an invalid request

Serv-U server responds with valid CSRFToken when the request contains only Session.

High

N/A

CVE-2021-35245

Broken Access Control Vulnerability for Serv-U

When a user has admin rights in the Serv-U Console, the user can move, create, and delete any files outside the home directory.

High

N/A

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